JOURNAL OF FOOD SCIENCE
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2024
·Vol. 89
·期 12
·9154-9165
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IF 3.2
Tiantian Zhang,Haizhi Lan,Huan Wang,Binglin Li,Martin Gand,Jiao Wang
Phosphatidylserine (PS) has many applications in functional food and pharmaceutical industries because of its critical role in activating important signal transduction pathways and modulating neurotransmitter release and receptor function. Several edible oils have been used to construct oil–water systems for the efficient production of PS under mild conditions by phospholipase D (PLD)-mediated transphosphatidylation. Toxic organic solvents were completely avoided throughout the process, from manufacturing to encapsulation. Results showed that higher enzyme selectivity and activity were found in the coconut oil–water and olive oil–water systems than in the traditional diethyl ether–water system. The maximum yields of PS in the two oil–water systems were more than 93%, whereas that in the diethyl ether–water system was only 78%. Hence, the coconut oil–water and olive oil–water systems should be the promising medium to produce PS and its microcapsules. Moreover, the enzymatic mechanism of PLD was simulated using molecular dynamics (MD) to understand diffusion channels, competitive bindings, solvent effects, structural changes, system stabilities, and product dissociation from the enzyme. MD results showed that more PLD-substrate complexes were detected in the oil–water systems than in the diethyl ether–water system. The conformational transition states of the protein between open and closed conformations were directly affected by the solvents used, and structural changes were observed in loop I (Asp309-Thr336). PLD in oil–water systems can not only maintain the native structure but also broaden the diffusion channels for substrates, which contributes to a higher enzymatic activity.
研究领域:
生物化学
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食品科学
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制药工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 12
·1964
·
IF 5.719
Qian Yang,Weiyin Su,Jianquan Hu,Yan Xu,Zhong Liu,Lanfeng Hui
Developing fluorine-free superhydrophobic and biodegradable materials for oil/water separation has already become an irresistible trend. In this paper, we designed two biopolymer oil/water separation routes based on cellulose stearoyl ester (CSE), which was obtained via the acylation reaction between dissolving pulp and stearoyl chloride homogeneously. The CSE showed a superhydrophobic property, which could selectively adsorb oil from the oil/water mixture. Additionally, the CSE was emulsified with an oxidized starch (OS) solution, and the resulting latex was used to impregnate commercial, filter base paper, finally obtaining a hydrophobic and oleophilic membrane. The SEM revealed the membrane had hierarchical micro/nanostructures, while the water contact angle indicated the low surface energy of the membrane, all of which were attributed to the CSE. The membrane had high strength and long durability due to the addition of OS/CSE, and the separation efficiency was more than 99% even after ten repeated uses.Keywords:oil/water separation;adsorption;hydrophobic;membrane
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymers
·
2022
·Vol. 14
·期 7
·1426
·
IF 4.967
Baoliang Wang,Lili Xing,Tieling Xing,Guoqiang Chen
In this study, a superhydrophobic fabric was synthesized by modifying the fiber’s surface with dopamine-containing hydroxyl functional groups. Furthermore, we introduced mercapto-based functional groups by the hydrolysis of mercaptopropylmethyldimethoxysilane (MPMDS) and finally grafted POSS and mercaptans using a thiol–ene click reaction. These processes generated a superhydrophobic fabric with a static contact and a sliding angle of 162° and 8°, respectively. The superhydrophobic fabric’s compact and regular micro-nano rough structure based on POSS and mercaptans provides stable fastness and durability, as well as high resistance to organic solvents, acid–base environments, mechanical abrasion, UV rays, and washing. Moreover, it can be used for self-cleaning and oil–water separation, and it has a wide range of applications in the coating industry.Keywords:dopamine;click chemistry;POSS;oil–water separation
研究领域:
材料科学
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纺织工程
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表面化学
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DOI
PubMed
高影响因子
LANGMUIR
·
2023
·
IF 3.9
Zhecun Wang,Min Guan,Xiangpeng Jiang,Jinyue Xiao,Yubing Shao,Shenghai Li,Yaohan Chen
Porous membranes with under-liquid dual superlyophobic properties, which are difficult to achieve because of a thermodynamic contradiction, have attracted considerable interest in the field of switchable oil/water separation. Herein, a bioinspired mesh membrane with alternating hydrophilic and hydrophobic chemical patterns on its surface that endows it with superamphiphilic and under-liquid dual superlyophobic properties is fabricated by a simple liquidus modification process. The as-prepared membrane possesses a combination of under-oil superhydrophobic and under-water superoleophobic characteristics in the absence of external stimuli. Moreover, it can effectively perform the on-demand separation of various oil/water systems, including immiscible oil/water mixtures and oil/water emulsions owing to its under-liquid dual superlyophobic properties.
研究领域:
材料科学
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界面化学
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产品关联
DOI
PubMed
高影响因子
Journal of Water Process Engineering
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2025
·
IF 6.7
Chen Zhao,Yiheng Wang,Nianping Wang,Ruilin Chen,Rui Yin,Xiangxi Li
The in-situ growth of ZnO is often used to modify membrane surface for enhanced hydrophilic and antibacterial properties due to significant modification effect, simple process and low cost. Nonetheless, some polymer membranes (such as PVDF membrane) lack active sites for ZnO growth on their surfaces, resulting in a small number of particles and unstable binding. This study utilized PDA/PEI to modify PVDF membranes for adequate active sites to capture Zn 2+ ions via the chelation action. Thereafter, nano ZnO can be synthesized easily via the alkalization reaction and thermal breakdown of Zn 2+ . Upon improving the modification conditions, ZnO particles were evenly distributed on the PVDF membrane's surface, leading to a reduction in membrane pore size from 0.38 nm to 0.29 nm. The water contact angle of the ZnO/PDA-PEI modified membrane dropped from 130° to 19°, indicating a significant enhancement in hydrophilicity. The modified membrane demonstrated enhanced anti-fouling performance in the oil/water separation experiment, achieving a steady permeance of 298 L·m −2 ·h −1 ·bar −1 , which was sixfold that of the original membrane. In the antibacterial experiment, the modified membrane exhibited significant antibacterial efficacy against both E. coli and S. aureus .
研究领域:
材料科学
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环境工程
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生物学
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
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2024
·
IF 5.7
Xiaojia Zhao,Junjie Fu,Fangqian Yin,Chaoqun Li,Yuyang Xu,Guirong Peng
A one-step co-deposition method based on dopamine and hydrophilic hydroxyethyl methacrylate (HEMA) was proposed for the modification of polyvinylidene fluoride (PVDF) membrane, which could ameliorate its oil-water separation performances and hydrophilicity. A range of modified membranes were prepared by adding different content of HEMA in the reaction solution. For the improved membrane, the minimum water contact angle can reach 13.63°, and the maximum underwater oil contact angle can reach about 150°. The pure water flux for the improved membrane reaches 9668 L·m -2 ·h -1 ·bar -1 , showing excellent hydrophilicity. In addition, the separation efficiency of the improved membrane for a variety of oil-water emulsions exceeds 98%, indicating good permeability and circulating oil resistance. At the same time, this approach is also applicable to other membranes on account of the extensive availability of dopamine.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 9
·1531
·
IF 5.719
Xiangcai Ge,Zhijun Zhou,Zheng Tan,Shoufei Wang,Xingchuan Zhao,Guina Ren,Bo Ge,Wei Li
Environmental pollution and clean water production are challenges to the development of human society. In this paper, devices consisting of a superhydrophobic Ni-CoFe2O4foam layer (floating layer), a hydrophilic channel and a superhydrophilic Ni-CoFe2O4foam layer (photothermal conversion layer) were designed. The light energy was converted into heat on the photothermal layer, for which the hydrophilic channel provided a small amount of water. The superhydrophobic layer ensured the floating and selective adsorption of organic solvents on the water surface, whose contact angle reached 157°, and the steam production rate reached 1.68 kg·m−2·h−1. Finally, the LSV curve demonstrated that the Ni-CoFe2O4foam prepared had a minimum starting potential, achieving the multifunctionality of the Ni foam.Keywords:superhydrophobic;oil–water separation;clean water production
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymers
·
2022
·Vol. 14
·期 9
·1786
·
IF 4.967
Dongyang Liu,Yuqing Duan,Shumei Wang,Murong Gong,Hongqi Dai
Studies have shown that fluorinated oil repellents are potentially harmful to humans and the environment, and therefore, the development of non-toxic, green, and environmentally friendly oil repellents has become inevitable. Microcrystalline wax is a branched saturated alkane with a molecular weight of 580–700 Da, which has a lower surface tension than edible oil. Herein, microcrystalline wax emulsion (fluorine-free oil repellent) was prepared by mechanical stirring–homogenization, the effects of emulsifier ratio and dosage on the emulsion performance were systematically investigated, and the resultant stable microcrystalline wax emulsions were applied to the paper surface to explore the oil and water resistance and water vapor barrier performance. The results showed that stabilized microcrystalline wax emulsion was obtained at the emulsifier Span-80/Tween-80 ratio of 5:5, and the emulsifier dosage was 20% (relative to the microcrystalline wax). When 6 g/m2of microcrystalline wax was applied to the surface of starch pretreated paper, the kit rating value of the paper was high, at up to 10/12, the Cobb60value decreased to 12.5 g/m2, the overall migration of paper was less than 10 mg/dm2, and the water vapor permeability was reduced by 81.9%, which met the requirements of oil and water resistance performance of food packaging paper.Keywords:microcrystalline wax emulsion;oil and water resistance;fluorine-free oil repellent
研究领域:
食品科学
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENERGY & FUELS
·
2019
·
IF 3.021
Haiyan Xu,Jinqing Wang,Sili Ren
Diatomite (DM) has superior adsorption performance for heavy metal ions in wastewater. However, the application of DM as a demulsifier in the treatment of a crude oil-in-water (O/W) emulsion has not yet been reported in the literature. In this work, a novel amphipathic and magnetically recyclable DM (M-DM) was synthesized by compounding with Fe3O4 nanoparticles and surface modifications. M-DM presented favorable demulsification performance under broad pH levels of the crude O/W emulsion. The demulsification efficiency (DE) reached a maximum when the M-DM dosage was increased to 450 mg/L. Moreover, M-DM could be recovered using its magnetism and still retained superior DE for 4 cycles. As a result of the strong interfacial activity, M-DM can reach the oil–water interface and interact with interfacial films. It was believed that the synergistic effect of electrostatic attraction and hydrogen bond interaction between M-DM and asphaltenes (main component of the interfacial film) promoted the rupture of the interfacial film and accelerated the coalescence of oil droplets to realize the oil–water separation of the O/W emulsion. This work provides a prospective novel demulsifier with cost-efficient, environmentally friendly, and universal application for the treatment of crude O/W emulsions.
研究领域:
环境科学
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化学工程
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材料科学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2021
·
IF 7.312
Temitope Fausat Ajibade,Huali Tian,Kayode Hassan Lasisi,Qiang Xue,Weihao Yao,Kaisong Zhang
Despite advances in membrane technology, the separation of complex oily wastewater using membrane filtration remains a daunting challenge for the industry. Recent approaches including membrane modification with two-dimensional (2D) nanosheets, showed susceptibility to swelling, fouling, and instability during operation. As a game-changer approach, a polyacrylonitrile (PAN) UF membrane modified with 3D nanostructured composite of MXene and O-MWCNT was introduced for the first time to treat complex oily wastewater. The composite membrane showed high separation performance of soluble dye-oil-water emulsion while maintaining high water permeability. Moreover, during the operational period, the composite membrane exhibits excellent antifouling and anti-swelling properties due to the synergetic effects conferred by the 3D nanostructures. Furthermore, the composite membrane possesses remarkable chemical stability evidenced by its high corrosion resistance when exposed to a strong acid (3 M HCl) and oxidant (NaOCl) solution for a long-time period. Overall, the operational stability was maintained in terms of flux and high rejection of oil and dye over a 45 h long-term operation. Consequently, this work provides an innovative, stable, and highly facile process for fabricating scalable UF composite membrane for the treatment of complex oily wastewater in a harsh chemical environment.
研究领域:
环境工程
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膜技术
·
废水处理
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Xichao Sun,Xinyan Wang,Jiao Li,Lilan Huang,Haibin Sun,Yunjie Hao,Linzhan Bai,Jian Pan,Xueli Gao
Traditional polymer-based membranes used for oil–water separation are limited in practical application because of their poor chemical stability, easy scaling, and low efficiency. In this study, a durable superhydrophobic electrospun carbon fiber (CF/Ni/F) membrane was successfully prepared by combining electroless plating of Ni nanoclusters and fluorination treatment, and used for highly-efficient oil–water separation in harsh environment. The increased roughness and reduced surface energy endowed the superhydrophobicity of membrane. The water contact angle (WCA) and oil flux of CF/Ni/F membrane reached 164.2° and 3669 L/(m 2 ·h). For non-emulsified and/or emulsified oil–water mixtures, the separation efficiency of CF/Ni/F membrane remained above 99% under gravity drive after only several cycles. In addition, the as-prepared CF/Ni/F demonstrated good chemical stability in the harsh environment.
研究领域:
材料科学
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环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2024
·
IF 4.5
Linlin Yu,Ruoyu Chen,Qian Jia
Oily wastewater, especially oil-water emulsions, has caused severe environmental damage. It is urgent to develop a simple, efficient superhydrophobic and superoleophilic material to address this issue. In this work, a multifunctional sponge based on MOF was proposed. The hydroxy-assisted method was employed to prepare MOF-5 with metal coordination centers. Subsequently, octadecylphosphonic acid (OPA) was used to hydrophobically modify MOF-5 to prepare stable and hydrophobic OPA-MOF-5. Polydimethylsiloxane (PDMS) with low surface energy was employed as the adhesive, and the hydrophobic OPA-MOF-5 was loaded onto the polyurethane (PU) sponge to obtain the stable superhydrophobic OPA-MOF-5@PDMS@PU with a WCA of 155.9°. The produced modified sponge exhibited high sorption capacity and oil-water separation efficiency, with a sorption capacity of 26.7 (petroleum ether)-85.6 (chloroform) g/g and a separation efficiency of over 99 %. It has also shown satisfactory emulsion purification and flame retardancy capacities.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）